Platen-press gripper.



R. HOLLAND & F. J. DUNN.

PLATEN PRESS GRIPPER;

' APPLICATION FILED MAR.8, 1915.

1,142,040 Patented June 8,1915.

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QFFIQQ RICHARD HOLLAND AND FREDERICK J. DUNN, OF DE'IBDIT, MICHIGAN.

ELATEN-PRESS GRIPPER.

Specification of Letters Patent.

Patented June 8, 1915.

Application filed March 8, 1915. Serial No. 12,726.

To all whom it may concern:

Be it known that we, RICHARD HOLLAND and FREDERICK J. DUNN, citizens of the United States of America, residing at Detroit, in the county of l/Vayne and State of Michigan, have invented certain new and useful Improvements in Platen-Press Grippers, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to a platen gripper, and the object of our invention is to provide grippers with adjustable fingers that can be easily and quickly positioned for printed sheets of various sizes.

In the general make up of the grippers, the parts are constructed with a view of reducing the cost of manufacture and at the same time retain the features by which accuracy, durability, simplicity and ease of assembling are secured, and with such ends in view, our invention resides in the mechanical construction to be hereinafter specifically described and then claimed.

Reference will now be had to the drawing, wherein Figure 1 is a plan view of a platen and grippers in accordance with this invention;

Fig. 2 is an enlarged plan of the gripper, partly broken away and partly in section, and Fig. 3 is an edge view of the same, partly broken away and partly in section.

In the drawing, 1 denotes a platen of a printing press and coiiperating therewith in the usual manner are grippers 2. Each gripper is in the form of a fiat tapering arm provided with a straight inner edge 3. Contiguous to this straight edge and in parallelism therewith is a series of equally spaced openings 4 having the walls thereof screwthreaded to receive screws 5 approximately half the depth of the openings 4.

Each of the openings 4- is intersected by a transverse socket 6 open at the straight edge 3 of the gripper and extending inwardly to intersect the opening 4. The sockets 6 are as near the bottom side of the gripper arm as it is possible to drill or otherwise form the same, and said. sockets accommodate wire fingers or arms 7 that have the inner ends thereof held within the sockets by the screws 5. The fingers 7 may be straight, as shown in Fig. 1 or irregularly shaped, as shown in Fig. 2. The fingers project inwardly and the fingers of the gripper confront the fingers of the other gripper, said fingers cotiperating in carrying a sheet to be printed to the form. It is through the medium of these adjustable fingers that a sufficient number can be employed and correctly positioned for handling a sheet, all of which is accomplished by providing a multiplicity of sockets and securing means for the fingers.

With the securing means of the fingers flush with the surface of the grippers and the fingers practically upon the platen, there is no danger of a sheet of paper being torn or injured by protuberances, furthermore, countersunk securing means precludes any possibility of such means being accidentally broken. However, should a finger be broken or bent, it is possible to quickly substitute a new finger. With the sockets closely arranged and using irregularly shaped fingers, as shown in Fig. 2, it, is possible to positively hold the marginal edges of a sheet to prevent inaccuracies of register, shifting, picking and pulling of said sheet or its entanglement with mechanism of a press.

One embodiment of our invention has been illustrated, and it is to be understood that the structural elements are susceptible to such changes as fall within the scope of the appended claims.

What we claim is 1. Grippers for a platen press, comprising,

the openings screwthreaded. the straight edges of said arms having sockets therein intersecting said openings, fingers in the sockets of said arms, and screws in the openings of said arms engaging said fingers.

2. A platen press gripper comprising a fiat arm having formed in an edge thereof sockets, said arm having openings in a flat face thereof intersecting the inner ends of the sockets of said arm, fingers extending into the sockets, and means in the openings of said arms engaging said fingers to hold the same therein.

In testimony whereof we afiix our signatures in presence of two witnesses.

RICHARD HOLLAND. FREDERICK J. DUNN. Witnesses:

GENEVIEVE E. MGGRANN, KARL H. BUTLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

